Patient numbers in participating countries per July 2010 (hospitals not yet including patients are not shown).
| Country | Participating Hospitals | Patients Included |
|---|---|---|
| Argentina | 5 | 2 |
| Bosnia and Herzegovina | 1 | 2 |
| Brazil | 4 | 2 |
| Cyprus | 1 | 15 |
| Spain | 3 | 46 |
| France | 4 | 107 |
| Great Britain | 8 | 2098 |
| Ireland | 3 | 225 |
| India | 5 | 22 |
| Italy | 4 | 208 |
| Japan | 4 | 372 |
| Latvia | 1 | 19 |
| Malta | 1 | 5 |
| Mexico | 1 | 1 |
| Netherlands | 14 | 3547 |
| Poland | 2 | 9 |
| Portugal | 3 | 814 |
| Thailand | 1 | 14 |
| Ukraine | 1 | 14 |
| United States | 4 | 301 |
| Total | 70 | 7823 |